Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate
2008-03-18
2010-11-09
Barr, Michael (Department: 1711)
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
C134S023000, C134S032000, C134S033000, C134S037000
Reexamination Certificate
active
07828906
ABSTRACT:
Depending on the actual operating situation and the composition of the fuels used for driving the internal combustion engine, contamination of the moving blades, of the guide device and of the turbine casing parts occurs sooner or later in the exhaust gas turbine. According to the invention, a small quantity of cleaning fluid is fed continuously or cyclically into the exhaust gas flow of an exhaust gas turbine and is directed onto the components to be cleaned. The small quantity of cleaning fluid can be fed in with unchanged operation of the internal combustion engine, such that the exhaust gas turbine can be cleaned or kept clean within the entire operating range of the internal combustion engine. Fluctuations in the power output of the internal combustion engine on account of requisite cleaning of the exhaust gas turbine therefore do not occur. Furthermore, the formation of thermostress cracks in the critical turbine casing parts is largely avoided.
REFERENCES:
patent: 3369533 (1968-02-01), De Pietro
patent: 4548040 (1985-10-01), Miller et al.
patent: 5944483 (1999-08-01), Beck et al.
patent: 35 15 825 (1985-11-01), None
patent: 0 781 897 (1997-07-01), None
International Search Report for PCT/CH2006/000514, dated Dec. 6, 2006 (in German).
Written Opinion of the International Searching Authority for PCT/CH2006/000514 (in German).
Bochud Dominique
Mathey Christoph
ABB Turbo Systems AG
Barr Michael
Buchanan & Ingersoll & Rooney PC
Chaudhry Saeed T
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